Topsoil Tour Review

A pH less than 7 on the pH scale is:

• neutral

• acidic

• basic

What is the range of the pH scale?

• 2-14

• 1-14

• 0-14

• 1-15

If the pH of the soil is too acidic or basic is does NOT affect the availability of nutrients for a plant.

• True

• False

Most plants prefer a pH range between:

• 2-4

• 4-6

• 6-6.8

• 9-10

The raise the pH of soil, a farmer would add _______ to the soil.

• lime

• fertilizer

• manure

• aluminum sulfate

Plants take up the nutrients that they need through their:

• roots

• stems

• leaves

• mitochondria

Some sources of plant nutrients include:

• manure

• water

• air

• lime

Plants use nitrogen to make ______________ which is the green pigment responsible for photosynthesis.

• magnesium

• chlorophyll

• chloroplast

• carotenoids

Special plants called ____________ like soybeans and peanuts have special bacteria in their roots that enable them to take nitrogen from the air.

• leafy greens

• fruits

• fungi

• legumes

What color do the leaves turn if a plant is lacking in nitrogen?

• purple

• red

• yellow

• green